Air purifier



FIG. 1 is a front perspective view of an embodiment of an air purifier showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a rear perspective view thereof;

FIG. 9 is a front perspective view of another embodiment of the air purifier;

FIG. 10 is a front view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a left side view thereof;

FIG. 13 is a right side view thereof;

FIG. 14 is a top view thereof;

FIG. 15 is a bottom view thereof; and,

FIG. 16 is a rear perspective view thereof.

The broken lines depict portions of the air purifier in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for an air purifier, as shown and described. 